内蒙古阿拉善荒漠啮齿动物群落格局的干扰效应

2002年～2004年在阿拉善荒漠区的典型地区选择了4种不同干扰条件的样区：开垦区、轮牧区、过牧区和禁牧区。4种不同干扰条件下啮齿动物群落格局的调查采用铗日法，在每个干扰区布设4个样地，每个样地面积10hm^2，每个样地布放500铗日，每个干扰区共布放2000铗日。取样时间为每年的4月、7月、10月。以不同月份下各干扰区各布铗样地啮齿动物群落的鼠种组成比例建立数据矩阵，应用SAS8．1软件的对应分析程序对其进行分析，得出不同月份各干扰区各布夹样方啮齿动物群落在前两个主因子轴上排列的二维散点图。结果表明，开垦区和禁牧区的群落格局相似，黑线仓鼠和子午沙鼠与开垦区和禁牧区有着较稳定的对应关系；小毛足鼠与轮牧区有着较稳定的对应关系；三趾跳鼠和三趾心颅跳鼠与过牧区的对应关系较稳定。

THE DISTURBANCE EFFECTS OF RODENT COMMUNITY PATTERNS IN ALASHAN DESERT REGION OF INNER MONGOLIA

The four kinds of study areas under different human disturbance were selected in typical region in Alashan desert of Inner Mongolia from 2002 to 2004, i.e. farmland area, rotational grazing area, over grazing area and forbidden grazing area. Four sites were located in every study ares and one time of investigation on one site was done with 500 trap - days. The rodent samples were collected and recorded in study sites in April, July, and October every year. The data was analysed with Correspondence Analysis program using the SAS 8.1 software. The resuits showed that the rodent community patterns of the farmland area and forbiden grazing area were similar. Mer/ones meridianus and Cricetulus barabensis had a stable correspondence with the farmland area and forbidden - grazing roborovskii had a stable correspondence with the rotatinal grazing area. Dipus sagitta and stable correspondence with the overgrazing area.